Watchcase-receiver.



Wf/nesses:

H. B. WIER. WAI'GHGASE RECEIVER. APPLICATION rum) APR. 10. 1912.

Patented July 7,1914.

UNITED T I T 1!? BEIGE.

HARRY B. WIER, 0F JERSEY CITY, JERSEY, ASSIGNOR TO WE STERN ELECTRIC COMPANY, 035 NEW YO RK, N. Y., ACORPORATION 0F ILLINOIS.

WATOHCASE-BECEIVER.

Specification of Letters Patent.

ratentecro'iny c.1914.

Application filed April 16, 1912. -Seria1No. 691,125.

To all whom 'it may concern ject of the King of England, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented a certain new and useful Improvement in VVEItCllcase-Receivers, of which the'following 1s a full, clear, concise,-and exact description.

This invention relates to telephone receivers, and more particularly to the magnet Structure thereof. its objects are to simplify the 'construction and to increase the elhciency 'of' such receivers.

The magnet structure-comprises a central core and two right-angled return polepiepes welded to the rear end of the core an extending'forwardly so that the free ends ofthe core and of the return polepieccs are in the-same plane and adjacent to the-receiver diaphragm. Preferably, the core is of soft iron and the return polepieces of steel forming thepermanentmagnets of the receiver. Like poles of these magnets are welded. one on either side of the Other features of this invention are the details of construction and combination of parts as will hereinafter more fully appear.

In the drawings-Figure 1 is a front view of the receiver with the cap removed; Fig. 2 is a side elevation in cross-section; Fig. 3 shows the magnet system removed; and Fig. at is a sectional view showing the method of attaching the conductor terminals to the receiver.

Referring toFigs. 1 and 3, the magnet system consists of two right-angled permanent magnets 34 and These magnets are spot weldedto the soft iron core 13 so that the poles 11 and 12 of the permanent magnets. are of the samepolarity; likewise,

, the poles welded to the soft iron core 13 are of like polarity, with the result that the free .end of the soft iron core 13 is of one polarity and the free ends of 11 and-12 of the permanent magnets 34 and 35 are of placed so that the three faces are slightly removed from the diaphragm 27.

In the back of the shell 10 is embedded a plate (Fig. to which the magnet system is attached. The magnet spool 20 is placed. around the soft iron core 13. The wires 525 and 23 leading into the receiver are provided with the usual tips 29 (Fig. said tips being held within the receiver by the screws 16 and 17, said screws engaging the cylindrical nuts 30. These nutsare drilled for the reception of the tips 29 and are secured to the casinglO by being embedded in an offset portion of said casing. The tops of these nuts 30 are provided with clips 18 andl'il to which are attached the magnet spool terminals 31 and The supporting ring 21 is provided with a portion 'bent at right angles to the plane of the ring, this right-angled portion being embedded in the casing. Through a hole in the casing passes a supporting cord 24, said cord being secured by a knot- .The diaphragm 2'? is supported on the casing and held in place by the cap 26.

It will be noticed that, with the exception of the ring 21,.there are no projections on the exterior of the receiver, giving the whole a neatappearance and reducing the liability o the receiver becoming entangled in the hair or other objects with which it may come in contact.

What I claim is:

1. In a telephone receiver of the class described, a magnet system, a receiver shell therefor, and aplate'embedded in said shell for supporting the magnet systeinin the receiver.

2. In atelephone receiver of the class described, two right-angled permanent magnets, a soft iron core, a magnet spool, like poles of one polarity of the permanent magnets welded to one end of the soft iron core, the other poles of like polarity having their faces in the same plane with the face of the free.end of the soft iron core, the magnet spool surrounding the soft iron core, a receiver shell surrounding the magnet system, and means embedded in the shell for supporting the. magnet system in the receiver. 3. In a telephone receiver of the class described, 'rightaangled permanent magnets radially disposed, a soft iron .core, a magnet spool, the poles of .one polarity welded to one end of the soft iron'core, the faces of vthe free poles in the plane of the face of the :free end of the soft iron-core, the magnet spool surrounding the soft iron core, a receivershell, a clamping plate embedded in the receiver shell supporting the magnet system,- means embedded'in the shell for supporting the receiver, and clamping means 10 embedded in the shell for attaching the conductor leads.

In Witness whereof, I hereunto subscribe my name this 15th day of April, A. D., 1912.

- HARRY B. WIER. Witnesses:

F. TOOHEY, W. F. HOFFMAN, 

